CVEs / CVE-2026-27760

CVE-2026-27760: opencats OpenCATS vulnerability

critical 9.2 CVSS 4.0 (from the CNA)
EPSS 32.9% chance of exploitation in the next 30 days, higher than 98% of CVEs (30 Oct 2026)
Last changed at its sources 28 Oct 2026

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Description

OpenCATS prior to commit 3002a29 contains a PHP code injection vulnerability in the installer AJAX endpoint that allows unauthenticated attackers to execute arbitrary code by injecting PHP statements into the databaseConnectivity action parameter. Attackers can break out of the define() string context in config.php using a single quote and statement separator to inject malicious PHP code that persists and executes on every subsequent page load when the installation wizard remains incomplete.
The CVE record, via NVD · published 28 Apr 2026 · NVD status: Deferred

Affected and fixed versions

As stated by the CVE record (from the CNA)
Product	Affected	Fixed in
opencats OpenCATS	up to and including 0.9.7.4	—

Exploitation

Not in the CISA Known Exploited Vulnerabilities catalog as of 30 Oct 2026.

Severity

CVSS 4.0	9.2 critical `CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X` Scored by the CNA ([email protected])
Weakness	CWE-94

References

Sources

Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.

This product uses data from the NVD API but is not endorsed or certified by the NVD.